On 4 October 2012, Wizz Air launched a new cabin bag policy to encourage customers to bring smaller baggage on-board following a successful month-long trial on the London Luton and Katowice route. This means that a smaller (42x32x25cm) cabin bag can be taken on board for free; larger cabin bags (56x45x25cm) would incur a fee varying between €10 or €30.[9]

While attempting to hasten SkyEurope's demise in June 2009, Wizz Air claimed it had been "profitable for several years".[13] However, as a private company it is not required to publish its financial accounts - annual reports are still available. In November 2009, it emerged that Wizz Air was significantly loss-making and had never made a profit while delaying the pay-back of €32 million of debt by five years.[14] Losses since commencing operations total €78 million, which, in 2009, fueled suggestions that the airline would file for bankruptcy.[15] Since then Wizz Air reported profits in 2012,[16] in 2013, in 2014[17] and in 2015.[2] Wizz Air has the second lowest CASK (cost per available seat km) among European airlines.[17]

Wizz Air started new services between Katowice and London Gatwick in 2008.[23] In January 2008, flights started from Gdansk to Gothenburg, Bournemouth and Coventry. In summer 2008, Wizz Air restarted summer seasonal services from Katowice and Budapest to Girona, as well as a new weekly service to Girona from Gdańsk. Other summer services from Budapest are Heraklion, Corfu, Burgas and Varna; from Katowice to Crete-Heraklion and Burgas; and Warsaw to Corfu and Burgas. It also restarted its three-times-weekly service from London Luton Airport to Burgas. On 2 October 2008, Wizz Air announced that a number of its Romanian services would have increased frequency following an order for three Airbus A320 aircraft.[24]

On June 26 2015 the airline opened its 19th base, at Tuzla International Airport in Bosnia and Herzegovina and deployed one new Airbus A320 aircraft at the airport. With one aircraft stationed at the airport, Wizz Air opened new routes to Memmingen (near Munich) and Torp (near Oslo), commencing on 26 June 2015, as well as to Hahn (near Frankfurt) and Skavsta (near Stockholm), commencing on 28 June 2015.[29]

On 8 June 2013, Wizz Air Flight 3141, an Airbus A320-232 (registration HA-LWM) from Bucharest - Henri Coandă Airport, Romania to Rome-Ciampino, Italy, made an emergency landing[35] at Leonardo da Vinci–Fiumicino Airport when the crew encountered problems getting one of the main undercarriage down and locked. The aircraft diverted to Fiumicino because of the longer runway, and firefighters applied foam after landing as a precautionary measure. The aircraft was evacuated using slides.[36] Initial reports of injured passengers were denied by both Wizz Air and Rome Fiumicino Airport, who said some passengers requested medical checkups but reported no injuries.[37]